Is This Normal???

Dunk50

New member
06 4runner 4.0 Automatic. When the Air conditioning is on or defrost is on and it cycles on and off, my RPM's fluctuate from 500 to 750. It is annoying at a traffic light where you have to have different foot pressure on the brake pedal. At a traffic light this may happen 3 or 4 times so it is cycling quite often. I know that when the air compressor kicks on the rps's have to keep up but something seems like it's not right! Your thoughts please?
 
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I have an '06 4.0 also, and it does the same thing. I found that if I just pop it in neutral at a light, I can just apply the same pressure to the brakes. Kinda annoying that it happens in the 1st place, but the work-around works for me.
 
Perfectly normal. Happens on both my 4Runner and '05 Tacoma. The first time when it happens, you think you may've been rear ended when you apply light pressure on the brakes. Or you vehicle lurches forwarding. It is annoying.
 
I had 2004 Civic and 2006 BMW 325i and they all do the same thing. I guess it is normal, I would just turn up the radio at long signal light...:biggrin2:
 
In my "opinion" the a/c cycles on/off too much in these rigs. "click on"/turns off/"click on"/turns off/"click on"/turns off/"click on"/turns off/"click on"/turns off/"click on"/turns off

It's like it'll click on for like 30 seconds, then turn off for 10, then click back on for 30 and so-on. Judging by the other posts here, it seems they all do this. It's only noticable if you're listening/watching for it though (and of course the RPM/light creep...lol)

Guessing it has to do with gas savings/etc. FYI that on my last trip to the dealer, I asked them to pressure check/give a checkup on my a/c. I mentioned exactly what mine does and they said its completely normal.
 

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